Process for treatment of fibrous material.



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riaoonss non transm ssion or sinuous BLliJIPh'EZELIAL.

No Drawing.

new and useful improvements in Processes for Treatment of Fibrous Material, of which the following is a specification.

My invention relates to processes for treatment oi. fibrous material such as Wood, and the like.

One of the objects of my invention is to provide a process for the treatment ofivood, wood pulp, fiber board, card-board and other fibrous substances or material wher by to.

render them Water, Weather, and acid proof and to increase their insulating and other desirable qualities.

In carrying my invention into effect, 1 first subject the material to a preservative, such as a saturated solution of sodium chlorid and then fill the pores of the material. with a filler possessing decay and electric current resisting-substance such as sulfur and the common resin of commerce. When relatively soft and porous Wood has been prop erly treated by my process, the product has an enhanced value and possesses a much higher specific gravity, having the qualities and appearance of the more expensive Wood and it is equally well adapted as ebony, for use in making brushand mirror backs, piano keys, toilet sets, keys forother musical instruments, such as violins, banjos, guitars and the like. Qwing to its relatively high current resisting 0r insulating qualities, it may be substituted in many situations for hard rubber or other more expensive insulat ing materials in the construction :of electrical apparatus and instruments.

Specifically, the desideraturn is to drive out of the pores of the Wood any resident content and then to coat the pores with a liquid reservative and finally to fill them With tie preserving and insulating compound.

Wood bodies or pieces of suitable size are immersed in a preferably saturated solution of Wood preservative, such for instance as sodium chlorid. The solution. is maintained hot and the Wood should remain in the s0lution preferably, for 24L hours or until the solution has thoroughly permeated the wood body. The wood may first have been kilndried or green wood may be used if the pre serving solution is heated to the boiling Specification of Letters ,Eatent.

An i. ill, 19.12%

Application filed October 22, with tefial No. 151K393.

point, this will drive out the sap and allow the entrance of the saline solution. From this solution the Wood is removed and dried or It is then allowed to dry, superficially. placed in a vat or other suitable recrngtacle conta'ning boiling sulfur and resin. 1 have found that suilicient sulfur should be used to submerge the Wood and tl'iat very good results may be obtained when the resin is about one per cent. in Weight of the sulfur or ninety-nine per cent. of sulfur and one per cent. of resin may be satisfactorily used.

The fibrous material should be maiutaiuiul in this boiling solution until it assui'ues the desired color and Weight. Th8 time required for this innnersion depends to some extent upon the character of 'the'body or material operated upon. For example, in the treat ment of "WOGd the time that it shall remain in the boiling sulturu'esin solution varies from 3 days.

litter the substance has been cooked in the sulfur solution, for the requisite period of time, it is taken out and rapidly cooled. This may conveniently be done by immersing it in cold Water. This has the eiiect otmiiii'ei'ting the sulfur into a plastic state reilulering thetreated body less brittle than it would otherwise be if allowed to cool slowly,

The word resin, used in the claims, reters to the common resin of ,COI'IHI'IQI'CQ, a by product in the manufacture oi? turpentine from the emulation of trees or plants of the conifer family.

While it have described my process in minute detail it will be manifest that changes in the specific manner of carrying my invention into elrect may be made within the scope of the appended claims.

Having described my invention, What 1 claim t--- l. T process oi treating fibrous material such as wood or the, like which consists in impregnating the material with a solution oi sodium chlorid, or the like; then boiling it in a solution of sulfur and resin, then cooling: it.

2. The process of treating fibrous material to render it substantially non-absorbent and to increase its electrical. insulating qualities which conSiSts in immersing it in a hot saturated solution of sodium chlorid for a protracted period oi tinic; then removing it from the solution and drying it; then placing it in a solution of sulfur and resin main ill) tained at tempe 'ature suflicient to boil the sulfur until the pores are sufiiciently filled; thcu removing the material from the sulfur bath and inunediatel i' cooling it by appliation of water,

3. The process for treatmentof fibrous material, such as 'OUti or the like, whieh con sists in dehydrating the nuitc'rial; immersing it in a hot saturated solution of sodium ehlorid; then superficially dryingthe material; then suhinerging said Illilttl'itliill a hot solution of sulfur and resin, then cooling-it.

4. The process for treating ot' fiblOllS lllilterial to render it substantially non-absorbent and non-coinluctive, such as wood or the v maintained at its boiling point; then removing it from the latter solution and quickly cooling it.

In testimony whereof I hereunto set. my hand in the presence of two subscribing witnesses.

WILLIAM WEIMAR.

In the presence of- MOLLIE E. Pl-I-ZFFER,

C. G. CANNON. 

